Erythranthe [Calypso] (mixed)

RHS Plant Profile
monkey flower 'Calypso'

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Synonyms

Mimulus 'Calypso'

Award of Garden Merit
Alpine Rockery Annual Biennial Herbaceous Perennial Bogs

A bushy, branching tender perennial, often used as an annual, growing to a height of up to 23cm. Leaves are mid-green, small, oval and slightly serrated. Flowers are all colours, from oranges, and yellows to reds and pinks and bloom throughout summer

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
1 year
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

Chalk Clay Loam Sand
Moisture
Poorly–drained or Moist but well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun Partial shade
Aspect
East–facing or North–facing or South–facing or West–facing
Exposure
Exposed or Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

  • H1A: under glass all year (>15C)
  • H1B: can be grown outside in the summer (10 - 15)
  • H1C: can be grown outside in the summer (5 - 10)
  • H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
  • H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
  • H4: hardy through most of the UK (-10 to -5)
  • H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
  • H6: hardy in all of UK and northern Europe (-20 to -15)
  • H7: hardy in the severest European continental climates (< -20)
H4

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Phrymaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy, Clump forming
Genus
A genus of over 120 annuals or herbaceous perennials, many of which tolerate wet soils or even shallow water. Flowers are red, pink or yellow and some have a musky fragrance. They are a key food source for some species of butterflies and moths
Name Status
Trade

How to Grow

Cultivation

Grow in fertile, humus-rich, moist soil in full sun or light dappled shade. Suitable for bog gardens

Propagation

Propagate by seed or division in spring

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Hanging Basket
  • Patio and container plants
  • Rock garden
  • Bedding
  • Flower borders and beds
  • Garden edging
  • Ground cover

Pruning

Cut back after flowering

Pests

May be susceptible to damage by slugs and snail

Diseases

May be susceptible to Powdery mildews, especially young plants